Urethanes

Polyurethanes can be dangerous! SAFETY FIRST ! ! ! READ THE DATASHEET

Use only in adequate ventilation and with correct safety kit (active carbon filter) vapour mask, gloves and safety specs.

No liability is accepted for use of this product or any loss or injury.

If you expereince any dermal rashes or breathing issues visit your doctor immediately as this indicates a sensitization towards polyurethane. READ THE DATASHEETS SUPPLIED!

Polyurethane Fast Cast (excluding water clear variant)
1. Assess approximately the volume you need, assume 1kg = 1 litre
2. Measure out Part A (Polyol) to desired weight
3. Add filler powder to desired ratio (usually max 5:1)
4. Zero your scales and add the same weight of Part B (isocyanate)
5. Ensure your weighing is within 2% accuracy (minimum!)
6. Potlife on our fast cast is 5 minutes, mix and pour before this time elapses(hence mix filler into Polyol part first!)
7. Demould at approximately 30 mins. In colder temps this may extend, in warmer temps this may reduce!!
8. Handle freshly cast PU with gloves! Hazardous isocyanate may remain on the surface which can causes sensitization, dermal rashes. REFER TO THE DATASHEET for full risk assessment.

Polyurethane Water Clear 1-5mm & 5-50mm Section
1. Assess Amount Required assuming 1kg=1 litre (this is approximate!)
2. Weigh Out Part A into suitable mixing pot making sure this is DRY!
3. Zero scales and measure exactly same weight of Part B Isocyanate
4. Mix very well trying not to whip in air. Undermixed water clear PU will cure TACKY!!!
5. Allow to stand for air release or use a degass unit to remove all air
6. Pour into mould. Ensure mould is 100% dry, if encapsulating ensure item is 100% DRY!!
7. Will gel at around 15m for 1-5mm section and 65 mins for 5-50 mm section
8. Demould at just an hour or so for the thin section variant and about 3.5 hours for the 5-50mm variant
9. Full cure will be reached in 24 to 30 hours! If you can leave it in the mould!
10. Handle freshly cast PU with gloves! Hazardous isocyanate may remain on the surface which can causes sensitization, dermal rashes. REFER TO THE DATASHEET for full risk assessment.

Polyurethane Flexible Soft & Medium Foam
1. Assess approximately the volume you need, assume 1kg = 1 litre
2. Measure out Part A (Polyol) to desired weight
3. Zero your scales and add the same weight of Part B (isocyanate)
4. Ensure your weighing is within 2% accuracy (minimum!)
5. Foam will begin to cream immediately and reach full rise in 5 mins so dont hang about!
6. See datasheets for demould but as early as 20-25 mins
7. In older rtv moulds consider mould wax release agent. In rigid moulds we recommend it

Polyurethane Rigid Foams
This is one product that you can measure easier by volume!
1. Measure out half volume of Part A
2. Whip it up well to enrich the part with air which will help foaming action
3. Add equal volume of Part B (easiest if you measure into another container.
4. Mix briskly and return to part B container to ensure no wet out of pot and mix quickly again.
5. Pour into mould and allow to free rise. Up to 5 times the volume can be seen.

With all PU's its essential that as soon as you express anything from the container the lid is replaced immediately. If you have a dry gas to purge the top of the liquid then DO SO!

If not keep the containers closed as much as possible. Ingress of water into part A or B is bad and will cause reactions you dont want!

Always use in a well ventilated area and if you feel unwell at any time get medical assistance and show them the labels of what you were using.

TOMPS TIPS
--Work Smart Work Safe with PU's! Use gloves goggles and repirators
--Mix accurately, excess part a or b will make your cast not set or even set soft
--Measure by weight at all times, its more accurate and ensures data sheet performance
--If potlife is too short, consider chilling the resin down to 10-15 clesius to extend potlife. Do not chill any further than this and definitely dont freeze it!
--Store out of sun and out of frost for max shelf life
--Close caps after dispensing without delay
--Use only PU pigments to colour your urethanes