01 / CUSTOMER PROBLEM
Cut seams and rework
A paste route can create a near-net surface over a lightweight substrate, reducing block joints, filler work and the amount of material that must be removed by CNC.
Product family
Tooling Pastes
Tooling Paste is the correct family name. EPTEK offers hand-applied build-up pastes, machine-applied pastes and fast-repair pastes for large forms and working surfaces.
Engineering view / Tooling pastes
Build a seamless surface over a lightweight core
Paste systems can remove board joints and reduce finishing on large models and molds. The useful question is not simply “hand or machine”; it is how layer thickness, sag resistance, open time, heat release, cure-to-machine time and surface finish fit the whole build.
02 / SELECTION LOGIC
Choose the deposition route
Use hand-applied grades for local shaping, transitions and repairs. Use machine-applied systems when repeatable deposition and large-area consistency control the schedule. Fast-repair grades are for targeted corrections, not a substitute for the main build system.
03 / PROCESS CHECKPOINTS
Control the layer
Check substrate preparation, thickness, vertical-face behaviour, working time, heat release, cure-to-machine window and dust/chip behaviour. Follow the relevant work instruction for mixing, build-up, machining and sealing.
04 / RELEASE CHECK
Pair the materials
The paste, core, adhesive, filler, surface coat and release system are a chain. A small representative trial is the quickest way to expose adhesion, shrinkage, porosity or paint-compatibility issues.
Trial the full build-up stack before the large job.Share geometry, temperature or hardness target, process route, quantity and finish requirement. The matching EPTEK TDS remains the authority for grade-specific values and handling limits.Contact us ↗
Product data
Product data
Hand-applied and machine-applied pastes are selected by build thickness, working time, machining window and service temperature.
01 / EP65
EP65
Machine-applied tooling paste
- Mix ratio
- 1:1
- Cured density
- 40.58–43.7 lb/ft³
- Pot life
- 50–70 min
- Tg
- 158 ± 3.6 °F
Translated TDS · PDF ↗
02 / EP72
EP72
Machine-applied tooling paste
- Mix ratio
- 1:1
- Density
- ~46.2 lb/ft³
- Pot life
- 45–60 min
- Tg
- 122 °F / 158 °F by cure schedule
Translated TDS · PDF ↗
03 / MP50
MP50
Hand-applied tooling paste
- Mix ratio
- 1:1
- Density
- 28.09–31.21 lb/ft³
- Pot life
- 40–70 min
- Machining window
- 16–20 h
- Maximum layer
- 1.97 in
04 / MP65
MP65
Fast repair paste
- Mix ratio
- 1:1
- Pot life
- ~20 min
- Machining window
- ~4 h
- Hardness
- Shore D65±2
- Tg
- ≥131 °F
Translated TDS · PDF ↗
01 / PRODUCT FAMILY
Hand-Applied Tooling Paste
MP50 has a dedicated use guide covering build-up, cure, machining, surface preparation and repair. The hand-applied range also includes MP65, MP100, MP120 and MP150; the catalogue also includes LP70 for local reinforcement and repair work. Catalogue-only routes should be checked against the current TDS before a purchase specification is issued.
02 / PRODUCT FAMILY
Machine-Applied Tooling Paste
EPMOLD EP65, EP72 and EP100 are machine-applied tooling pastes for forming a continuous layer over large master patterns. Select the grade and application process according to its technical data sheet.
03 / PRODUCT FAMILY
Fast-Repair Paste
For local repair, edge rebuilding and short-window corrections; exact grades and limits follow the catalogue.
Application-specific selection
EPMOLD LP70 for replicated tooling
For thin-wall replicated trimming fixtures, the EPTEK technical review identifies EPMOLD LP70 in a glass-filled paste or reinforced-shell construction. Select the surface gelcoat, backing laminate, shell thickness and cure as a compatible system.