Urethane Acrylate Adhesives
by Scott Bader
PEVE Bonding Pastes
PEVE Bonding Pastes
Primerless MMA Adhesives
Bonding Pastes
Bonding Pastes
M1-20
Product Overview
Crestabond M1-20 is a toughened, two component 10:1 acrylic adhesive designed for bonding composites,
thermoplastics and metals. This new generation of structural methacrylate adhesive meets the bonding
requirements of most assembly operations. Demonstrating excellent impact, peel, shear, compressive strength
and fatigue resistance properties across all bonded parts.
Features and Benefits
Primerless application
Excellent adhesion to dissimilar substrates
Fast setting and curing
Non-sag
High strength, modulus and toughness
Excellent environmental resistance
No need for extra materials or processes
Affords greater flexibility in design
Speeds up assembly process
Application on vertical surfaces
Designed for demanding structural applications
Designed for demanding environmental applications
Application Properties
Working Time
1
16 22 Minutes
Fixture Time
2
25 35 Minutes
Gap Filling 1 25 mm (0.04-1.0 inch)
Mixed Colour Grey/Black
Recommended Application
Temperature
18 – 25 C (64 – 77
o
F)
Crestabond
M1-20 TDS | Page 1 of 3 | Version: February 2020 www.scottbader.com
Tensile Strength
3
16 – 20 MPa (2.3 – 2.9 ksi)
Tensile Modulus
3
600 – 1000 MPa
(870 – 1450 ksi)
Tensile Elongation
3
80 – 100%
Aluminium Lap shear
4
17 – 21 MPa (2.4 – 3.0 ksi)
Recommended Operating
Temperature
5
-40 – 100 C (-40 – 212
o
F)
Mechanical Properties
Product M1-20 Adhesive Activator 1
Viscosity
6 100,000 – 140,000 cP
*
300-800 & 750-2000 dPa.s
**
80,000 – 120,000 cP*
100-300, 300-1000 dPa.s**
Specific Gravity 0.96 – 1.02 g/cc 1.05 – 1.15 g/cc
Mix Ratio (by volume) 10 1
Mix Ratio (by weight) 9 1
Colour Off white Black
Shelf Life
7
12 months 12 months
Liquid Properties
Technical Data Sheet
Crestabond
M1-20 TDS | Page 2 of 3 | Version: February 2020 www.scottbader.com
Substrates
Plastics
Acrylic
10
21 – 25 MPa
PVC
8
16 – 20 MPa
ABS
8
13 – 17 MPa
Other: Urethanes and common
engineering thermoplastics
Low Surface Energy
Plastics
e.g. PP, PE & PTFE
(use Crestabond PP-04)
Metals
Stainless
9
13 – 17 MPa
CRS
9
13 – 17 MPa
Aluminium
10
17 – 21 MPa
Other: Powder Coated Metals,
Carbon Steel
Zinc/ Galvanised Coated
Metals,
Copper
Composites
GRP/FRP
8
8 – 12 MPa
Carbon Fibre/ Polyester
DCPD Modified Vinyl Esters
Epoxy
11
Gelcoats
12
–
Non – Recommended
Substrates
Recommended Substrates
(Lapshear Strength MPa
4
)
Please contact Scott Bader technical services for information and advice on other substrates
Surface Preparation
The surface to be bonded can affect the strength and durability of the bond joint. Appropriate treatment may be
required to ensure that there are no traces of oil, grease, dirt or release agents through the use of a degreasing
agent, for instance acetone or another degreasing agent on the joint surfaces.
Mechanically abrading or chemically etching degreased surfaces can make bond joints more durable and
stronger. If abrading, a second treatment of degreasing is highly recommended.
Do not use petrol (gasoline), low grade alcohol or paint thinners.
i) Metals
Typically, the surface should be clean and dry by using an alcohol/solvent wipe and allowing the solvent to
evaporate before application. Certain metals, such as carbon steel may also require mechanical abrasion and a
subsequent alcohol solvent wipe prior to bonding.
ii) Thermoplastics
The surface must be clean, dust-free and dry. A suitable solvent such as iso-propanol can be used to degrease.
iii) Composites
The surface must be clean, dust-free and dry. This can be achieved by the use of proprietary strippable cloths
such as peel-ply (without lubricant contaminates). The laminate should be fully cured prior to bonding and
if the laminate surfaces are more than 3 days old, it is recommended that the surface must be cleaned with a
suitable solvent or cleaner with a lint-free, clean cloth prior to bonding.
Surface preparation, such as mechanical abrasion, is likely to be needed on gel coat surfaces and moulded
surfaces where release agents are likely to be present. When bonding epoxy laminates please test bond strength
prior to application.
Crestabond
M1-20 TDS | Page 3 of 3 | Version: February 2020 www.scottbader.com
Application
Prior to bonding, ensure the substrate surface is clean by following the surface preparation instructions provided.
Bulk dispensing equipment should be in good operating condition. Dispense the adhesive at a slow rate initially onto a
non-bonding surface until the mixed bead colour is uniform. Check the dispensed bead for cure quality before beginning
the bonding process.
Dispense enough adhesive to fill the bond gap before parts are mated. Avoid dry bonds by using adequate pressure to
mate parts and clamp properly to prevent joint movement. The working time is the approximate time after mixing that the
adhesive is still usable. The bonding process must be completed before the working time of the mixed adhesive expires.
The viscosities of both adhesive and activator are affected by temperature. The adhesive, activator and parts to be bonded
should be allowed to attain workshop temperature of between 18 C and 25 C (64
o
F and 77
o
F) prior to bonding. The
operating temperature should be maintained during the bonding process and until the adhesive is sufficiently cured to allow
movement of the assembly. Typically, such movement may be possible after the fixture time of the adhesive is achieved.
Ambient temperature, bondline thickness and the substrate materials being bonded can all affect the fixture time.
For industrial/commercial use only. Not to be used in household applications. The user must determine the suitability of
a selected adhesive for a given substrate and application. Contact your local Scott Bader representative for questions or
assistance with the selection of adhesives for your use. This product is intended for use by skilled individuals at their own
risk. Recommendations contained herein are based on information we believe to be reliable.
2020 ScottBader Co Ltd, February 2020
Scott Bader UK
Wollaston, Wellingborough, Northants
NN29 7RL, UK
Tel: +44 (0)1933 666738
Email: enquiries@scottbader.com
All information on this data sheet is based on laboratory testing and is not intended for design purposes. Scott Bader makes no representations or warranties of any kind concerning this
data. Due to variance of storage, handling and application of these materials, Scott Bader cannot accept liability for results obtained. The manufacture of materials is the subject of granted
patents and patent applications; freedom to operate patented processes is not implied by this publication.
Storage and Shelf Life
Crestabond products should be stored in their original container out of direct sunlight. The bulk product or cartridge
material should be opened only immediately prior to use. The expiry date is indicated on the product labels.
The shelf life is defined from date of manufacture when stored at a recommended temperature between 2 C and 23 C (36
o
F
and 73
o
F). It is highly recommended that products should never be frozen. Exposure to temperatures above 23 C (36
o
F) will
reduce the shelf life of these materials. Exposure above 35 C (95
o
F) of activators, including the cartridges, should be avoided
as the reactivity of the product is quickly diminished.
Packaging
Crestabond M1-20 is supplied in 18Kg (40 lb) plastic pails, 180Kg (397 lb) drums, pre-packed 400ml co-axial and 50ml side by
side cartridges.
Health and Safety
See separate Material Safety Data Sheet.
Urethane Acrylate Adhesives
by Scott Bader
PEVE Bonding Pastes
PEVE Bonding Pastes
Primerless MMA Adhesives
Bonding Pastes
Bonding Pastes
1. Working time measured with 10g mass of
adhesive with 10:1 mix ratio by volume at 24 C (75
o
F).
2. Fixture time defined using an ISO 4587 lap shear sample, 0.26mm bondline
thickness with 23 C (73
o
F) ambient temperature achieving >1.4MPa.
3. Tested to ASTM D638.
4. Metals tested according to ISO 4587, Thermoplastics according to ASTM 2564
and GRP according ASTM 5868.
5. Maximum temperature where an ISO 4587 lap shear sample, 0.26mm
bondline thickness achieves >3MPa.
6. Viscosity measured using a Brookfield Viscometer at 24 C (75
o
F)*
Viscosity measured using HAKKE RV1 Rheometer at 25
o
C (77
o
F)**
7. Shelf life defined from date of manufacture when stored as
recommended.
8. Substrate failure when tested.
9. Adhesive failure when tested. 10. Cohesive failure when tested.
11. Surface preparation of epoxy laminates may be necessary and testing
should be performed to ensure sufficient bond strength is achieved.
12. Surface preparation is likely to be needed on gelcoat surfaces to
ensure no release agents are present.