---
title: Rhubarb & Custard Flavour Concentrate By Rainbow Flavours
date: 2026-06-18T09:27:00Z
modified: 2026-07-01T13:40:08Z
permalink: "https://rainbowvapes.co.uk/product/rhubarb-and-custard-flavour-concentrate-by-rainbow-flavours/"
type: product
status: publish
excerpt: Rhubarb & Custard flavour concentrate by Rainbow Flavours delivers tangy rhubarb with smooth, creamy custard notes and a sweet finish.
wpid: 310432
product_type:
  - variable
product_cat:
  - Rainbow Flavours
featured_image: /wp-content/uploads/2026/06/rainbow-flavours-rhubarb-and-custard-flavour-concentrate.jpg
featured_image_alt: rhubarb and custard flavour concentrate by rainbow flavours
timestamp: 2026-07-01T13:40:08Z
tags:
  - variable
  - Rainbow Flavours
---

# Rainbow Flavours Rhubarb & Custard Flavour Concentrate

Create a classic sweet shop-inspired mix with **Rainbow Flavours Rhubarb & Custard Flavour Concentrate**. The **Rhubarb & Custard** flavour combines sharp, tangy rhubarb with smooth and creamy custard, creating a nostalgic dessert-style profile for DIY e-liquid recipes.

**Rhubarb & Custard** is ideal for mixers who enjoy sweet, creamy flavours with a fruity tang. It works beautifully as a standalone mix or blended with vanilla, cream, custard, strawberry, apple, biscuit or other dessert-style recipes.

## 🍬 Rhubarb & Custard Flavour Profile

Rainbow Flavours **Rhubarb & Custard** delivers a balanced blend of tart rhubarb and sweet custard, with fruity sharpness on the inhale and a smooth creamy finish. **Rhubarb & Custard** is ideal for vapers who enjoy nostalgic sweet flavours with a rich dessert edge.

## 📦 Rhubarb & Custard Product Features

- **Rhubarb & Custard** flavour concentrate
- Tangy rhubarb with smooth custard notes
- Sweet, creamy and nostalgic flavour profile
- Great for DIY e-liquid mixing
- **Rhubarb & Custard** can be used as a standalone flavour or blended with vanilla, cream, custard, strawberry, apple and biscuit notes
- From the Rainbow Flavours concentrate range

## 🧪 Rhubarb & Custard Mixing Information

**Rhubarb & Custard** is a **flavour concentrate** and must be diluted before use. It is designed for DIY mixing with VG, PG and nicotine shots if required.

## ⚠️ Important Information

This **Rhubarb & Custard** product is a flavour concentrate and is **not intended to be vaped on its own**. Always mix before use.

A tangy, creamy and nostalgic **Rhubarb & Custard** concentrate that adds classic sweet shop flavour to your DIY e-liquid creations.





























Rainbow Flavours Concentrate Mixing Chart











**Based on 10ml Rainbow Flavours concentrate at 20% flavouring**
**Final bottle size: 50ml**
**Concentrate type: PG-based**

### 0mg Mix — No Nicotine Shot Added



| Desired VG/PG Ratio | Rainbow Flavours Concentrate | Add VG | Add PG | Final Mix |
| --- | --- | --- | --- | --- |
| **40VG / 60PG** | 10ml | 20ml | 20ml | 50ml |
| **50VG / 50PG** | 10ml | 25ml | 15ml | 50ml |
| **60VG / 40PG** | 10ml | 30ml | 10ml | 50ml |
| **70VG / 30PG** | 10ml | 35ml | 5ml | 50ml |
| **80VG / 20PG** | 10ml | 40ml | 0ml | 50ml |





---

## With 1 x 10ml Nicotine Shot Added

**Example based on a 10ml 18mg nic shot at 70VG / 30PG**
This would make a **50ml finished bottle at approx. 3.6mg nicotine strength**.



| Desired VG/PG Ratio | Rainbow Flavours Concentrate | Nic Shot | Add VG | Add PG | Final Mix |
| --- | --- | --- | --- | --- | --- |
| **40VG / 60PG** | 10ml | 10ml | 13ml | 17ml | 50ml |
| **50VG / 50PG** | 10ml | 10ml | 18ml | 12ml | 50ml |
| **60VG / 40PG** | 10ml | 10ml | 23ml | 7ml | 50ml |
| **70VG / 30PG** | 10ml | 10ml | 28ml | 2ml | 50ml |
| **80VG / 20PG** | 10ml | 10ml | 33ml | 0ml\* | 53ml\* |





\* An **80VG / 20PG mix is not possible as an exact 50ml mix** when using a 10ml PG-based concentrate plus a 70VG / 30PG nic shot, because the PG content is already too high. To get closer, use a **100VG nic shot** or reduce the final nicotine strength.

---

### Simple Mixing Rule

Your **10ml Rainbow Flavours concentrate already counts as 10ml PG**.

So when working out your mix:

**Final PG amount needed – 10ml concentrate PG – PG from nicotine shot = extra PG to add**

**Final VG amount needed – VG from nicotine shot = extra VG to add**

For best results, shake well and allow the mix to steep if needed, especially with dessert, cream, or complex flavours.