New Weld-On® Methylene Chloride-FREE and Trichloroethylene-FREE Solvent Cements for Acrylics Introducing the NEW Weld-On® 3, Weld-On® 4 and Weld-On® 16
Weld-On® 3 is a water-thin, non-flammable cement formulated for clear bond to many thermoplastic substrates, particularly acrylic. The initial bond forms within a few minutes and quickly increases in strength to a high level within only a few hours.
SUBSTRATE RECOMMENDATIONS Bonds acrylic (PMMA) to itself.
Weld-On® 4 is a water-thin cement formulated to develop clear bond within minutes with a longer time full bond strength than Weld-On 3. It is less likely to leave white marks (commonly called blushing) with significant and increased strength reached over several hours.
SUBSTRATE RECOMMENDATIONS Blush-resistant cement for bonding acrylic (PMMA) to itself.
Weld-On® 16 is a medium-bodied, clear solvent-type acrylic cement with very high strength. The fast curing time means some parts may be handled within a few minutes when applied to cast, molded or extruded acrylics. Bond strength continues to develop very rapidly reaching a substantial level and forming strong joints within hours. SUBSTRATE RECOMMENDATIONS Formulated for acrylic (PMMA); also bonds butyrate, PVC, ABS, polycarbonate, and porous plastics.
WELD-ON® NUMBER
STOCK
COLOR
NUMBER OF COMPONENTS
WORKING TIME
FIXTURE TIME
ULTIMATE
MINIMUM EXPECTED SHELF LIFE @73°F (yr)
TYPICAL SPECIFIC GRAVITY
VISCOSITY REFERENCE
SIZES UNITS/CASE
NUMBER
BOND
STRENGTH
(g/cc)
16369 16372 16370 16371 16374 16377 16375 16376 16381 16382 16383 16384
clear clear clear clear clear clear clear clear clear clear clear clear
1 1 1 1 1 1 1 1 1 1 1 1
1 min 1 min 1 min 1 min
2 min 2 min 2 min 2 min 3 min 3 min 3 min 3 min
2,825 lbs/in 2,825 lbs/in 2,825 lbs/in 2,825 lbs/in 2,429 lbs/in 2,429 lbs/in 2,429 lbs/in 2,429 lbs/in 2,626 lbs/in 2,626 lbs/in 2,626 lbs/in 2,626 lbs/in
2 years 2 years 2 years 2 years 2 years 2 years 2 years 2 years 2 years 2 years 2 years 2 years
1.218 ± 0.01 1.218 ± 0.01 1.218 ± 0.01 1.218 ± 0.01 1.164 ± 0.01 1.164 ± 0.01 1.164 ± 0.01 1.164 ± 0.01 1.202 ± 0.01 1.202 ± 0.01 1.202 ± 0.01 1.202 ± 0.01
water thin water thin water thin water thin water thin water thin water thin water thin water thin water thin water thin water thin
GALLON QUART
4 4 6
3
PINT
1/4 PINT
24
1-2 min 1-2 min 1-2 min 1-2 min
GALLON QUART
4 4 6
4
PINT
1/4 PINT
24
5 min 5 min 5 min 5 min
10 min 10 min 10 min 10 min
GALLON
4 4 6
16
PINT
5 oz TUBE 1.5 oz TUBE
24
Benefits of Solvent Bonding vs Mechanical Fastening
Mechanical Fastening Advantages 4 Can be easily inspected once installed; may be pulled apart 4 Immediate connection; no curing time Disadvantages 8 Stress only at the connection point; not consistently spread across substrate 8 Visible on signage 8 Difficult to paint or hide 8 Higher probability of leakage/ corrosion at joints
Solvent Bonding Advantages 4 Evenly distributes stress on substrate 4 Joins complex parts 4 Invisible finish on sign substrate’s surface 4 Acts as a sealant & prevents corrosion 4 Works well with thin metals 4 Requires little finishing and training 4 Reduce labor time and cost 4 Can be sanded, painted or drilled 4 Bonds dissimilar substrates 4 Reduces vibrations
Disadvantages 8 Some curing time required
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